Blue,
When my local gives a high volley I normally take it for the most I can without drawing too much suspicion. I want to keep those soft numbers coming for a long time. Then if I find myself with too much risk, I'll unload some on the other side on the best line I can find online.
I never do "pure" middles. If a middle exists I will always favor one side over the other and have net bet riding on the game.
With your local I would calculate first whether you have a middle or not, and if so, I would hit it no matter what. If not, then I'd just consider it as one of my options which I may or may not take, depending on which side I like.